Promise.resolve().then(() => {
    console.log(0);
    return Promise.resolve(4);
}).then((res) => {
    console.log(res)
})
 
Promise.resolve().then(() => {
    console.log(1);
}).then(() => {
    console.log(2);
}).then(() => {
    console.log(3);
}).then(() => {
    console.log(5);
}).then(() =>{
    console.log(6);
})